[Liquid Hellfire] is and orb which targets a players location and will deal heavy damage – this is lessened with distance from the impact

[Fel Efflux] is a channelled ability which deals moderate ticking damage if stood in field effect

[Hand of Gul’dan] summons a meteor which when it impacts will do heavy damage – it will also spawn an add that must be dealt with quickly
Fel Lord Kuraz'mal – summons [Fel Obelisk] under players which deals damage and stuns. He also casts [Shatter Essence] on tanks which deals very high fire damage
D'zorykx the Trapper – periodicly casts [Anguish Spirits] which deal shadow damage. He also casts [Soul Vortex] on the tanks which deals very high stacking damage
Inquisitor Vethriz – casts [Drain] on random players which should be dispelled. He also spawns [Gaze of Vethriz] which channel energy beams. He will also use [Shadowblink] and move locations

The beneficial abilities the raid gets to deal with this are:
Tanks should have the [Resonant Barrier] for Shatter and Soul Harvest
Healers should use the [Scattering Field] to reduce Fire damage taken by the raid
DPS Damage dealers should use [Time Dilation] during DPS CD’s to maximise damage on these mini-bosses

Healers should dispel Drain very quickly

Phase Two: The Ritual of Aman'thul

Continue to avoid [Liquid Hellfire] – these can now become Empowered and leave a patch of burning Fel Fire

[Bonds of Fel] chains a player and dels fire damage. This requires nearby players to collapse onto the shackled player to break the effect – [Scattering Field] is helpful here

[Eye of Gul'dan] spawns must be killed very fast to prevent them from reaching max energy and [Duplicating] and creating more and more them [Time Dilation] is useful here

[Hand of Gul’dan] will now summons a Dreadlord – these adds cast [Carrion Swarm] which can be interrupted but in doing so will give them a stacking 20% buff - this is on heroic difficulty

[Fel Scythe] is cast when a players is within 2 yards of the current tank – this effectly expends all his current fel engery as fire damage split between the 2 target which increase in potency by 5% per point expended
If he reaches 100% energy then he’l cast [Fel Scythe] on his primary target
Every case of [Fel Scythe] he will gain [Fury of the Fel] which increases his attack speed by 15% for 10 seconds

Phase Three: The Master's Power

The [Eye of Gul’dan] is now empowered which deals higher fire damage – same effect as P2 and must be killed before they Duplicate

[Storm of the Destroyer] deals very high which increases as it grows in size – the raid has to get out of this very quickly – it starts at 10yard and increases 20yrds, 30yrds & 60yrds

[Well of Souls] requires players to take turns soaking [Soul Corruption] so as to minimize raid wide damage from [Black Harvest]
[Souls Siphon] is a healing absorb debuff
Healer CD’s will be needed for this stage

Move away from players affected by [Flames of Sargeras] as this does heavy damage leaving [Desolate Ground] AoE patch

P2
Move out of Liquid Hellfire – this can Empower leaving patch on the ground
Bonds of Fel – healer + DPS move to debuffed player to break – use Scatter Field ability
Eye of Gul'dan need to be killed quick to prevent them Duplicating – DPS can use Time Dilation
Fel Scythe will split all stored Fel Engery between two targets – tanks have to manage this
Every cast of Fel Scythe increases cast speed by 15% for 10 seconds

P3
Kill Empowered Eye of Gul’dan very quickly to prevent Duplicate
Move far away from Storm of the Destroyer
Move away from players with Flame of Sargeras
Raid helps soak Soul Corruption
Healer CD on Black Harvest
Healers watch players with Soul Siphon
Fel Scythe will split all stored Fel Engery between two targets – tanks have to manage this
Every cast of Fel Scythe increases cast speed by 15% for 10 seconds

Everything will deal significantly more damage so avoid all unnecessary damage

Phase 1
Mini-bosses each gain an new ability:
Fel Lord Kuraz'mal - summons several patches which will erupt into [Fel Obelisks]. These stun players if hit and deal ticking damage. Just move out of the zone before they appear
Inquisitor Vethriz - casts [Drain] on multiple players. This will heal him for each tick of damage – healers need to dispel this very quickly
D'zorykx the Trapper – casts [Anguished Spirits] which will land on the ground and explode dealing damage. Just move out of the landing zone

Phase 2
[Hand of Gul'dan] will now summon an additional add called a Dreadlord
Dreadlord is picked up by the tank and is the primary DPS target – use Time Dilation to max DPS on the add
Dreadlord will cast [Carrion Wave] – this will deal high shadow damage and cause player to sleep for 5 seconds if hit. This can and should be interrupted but doing so will give the add a stacking buff that will give it a 25% increased speed & damage. This is the main reason it should die very quickly

Phase 3
There are more [Flame of Sargeras] debuffs now and care needs to be taken in placing the flame patches so as not to limit the raid movement

P2
Move out of Liquid Hellfire – Empowered leaves patches on the ground
Bonds of Fel – healer + DPS move to debuffed player to break – use Scatter Field ability
Eye of Gul'dan need to be killed quick to prevent them Duplicating – DPS can use Time Dilation
Fel Scythe will split all stored Fel Engery between two targets – tanks have to manage this
Every cast of Fel Scythe increases cast speed by 15% for 10 seconds

P3
Kill Empowered Eye of Gul’dan very quickly to prevent Duplicate
Move far away from Storm of the Destroyer
Move with Flame of Sargeras and place the flame patches carefully - * there are more of these*
Raid helps soak Soul Corruption
Healer CD on Black Harvest
Healers watch players with Soul Siphon
Fel Scythe will split all stored Fel Engery between two targets – tanks have to manage this
Every cast of Fel Scythe increases cast speed by 15% for 10 seconds